KF

Klaas R. Franzen

U.S. Philips: 1 patents #4,133 of 8,851Top 50%
📍 Hilversum, NL: #134 of 289 inventorsTop 50%
Overall (All Time): #4,055,491 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4396799 Combination of a loudspeaking telephone set and a hand set for soft speaking Gijsbert Versteeg, Cornelis M. A. Theunisse 1983-08-02